forced outages

8/12/2019 Forced Outages

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This data comes from the NERC database

This workbook contains tables and figures from the Forced Outages section.The statistics are broken down by capacity and last stage blade length, and cover only

200-1000 MW units. Where possible, units larger than 1000 MW have been shown separately.

The statistics shown here are for the entire NERC reporting period, 1982-1998.

Name Type Description

1 Data worksheet Forced outages 200-1000 MW range - cause and duration

2 Forced Num chart x Cause group - all units from 200-1000 MWy Number of forced outages

3 Forced Dur Day chart x Duration (days) - 200-1000 MW units

y Number of forced outages

4 Forced Dur Week chart x Duration (weeks) - 200-1000 MW units


5 Forced Dur 3-30 chart x Duration (days) - 200-1000 MW units

y Number of forced outages from 3-30 days long

6 Forced Dur 3-60 chart x Duration (days) - 200-1000 MW units

y Number of forced outages from 3-60 days long

7 Failure Rate chart x Year of event start

y Number of forced outages during the year

8 Summary worksheet Statistics summary by size group

Cause group and duration table

9 LSB


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9 LSB


3/43

29 >1000 MW dur chart x Duration (week) - units with capacity above 1000 MW



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Forced Outage Statistics, 1982-1998

Units with Capacity 200 - 1000 MW

All forced outages presented here are at least 72 hours in duration.

The minimum interval between forced outages of the same cause code is 30 days.

U1 Immediate Unplanned Outage

U2 Delayed Unplanned Outage

U3 Postponed Unplanned Outage

SF Startup Failure

FORCED OUTAGES U1, U2, U3, SF

Cause Group Group Definition Avg Time (hr) Events U1 U2 U3 SF

4000-4099 HP Turbine 393 209 146 29 25 9

4100-4199 IP Turbine 588 77 61 8 6 2

4200-4250 LP Turbine 461 298 246 25 17 10

4260-4269 Valves 161 299 195 52 38 14

4270-4279 Piping 265 90 64 14 9 3

4280-4289 Lube Oil 278 115 89 14 4 8

4290-4309 Controls 215 192 148 21 18 54400-4499 Misc. Turbine 348 317 252 39 12 14

1597

FORCED OUTAGES U1, U2, U3, SF (Duration by week)

Week Avg Duration Avg Duration Events U1 U2 U3 SF

days hours0 4.5 108 883 635 119 88 41

1 9.7 233 387 299 47 25 16

2 16.5 395 99 76 13 6 4


5/43

25 179.4 4306 1 1 0 0 0

27 192.0 4609 2 2 0 0 0

28 201.8 4842 1 1 0 0 038 268.9 6454 1 0 0 1 0

41 287.1 6890 1 0 0 1 0

46 328.7 7889 1 1 0 0 053 371.8 8922 1 1 0 0 0

Number of forced outages per year

Year Events

1982 831983 141

1984 120

1985 95

1986 113

1987 117

1988 92

1989 109

1990 95

1991 81

1992 84

1993 74

1994 89

1995 80

1996 65

1997 761998 83


Duration Avg Duration Events U1 U2 U3 SF


6/43

22 539 9 8 1 0 0

23 566 14 12 2 0 0

24 587 12 11 1 0 025 612 8 8 0 0 0

26 632 5 5 0 0 0

27 657 6 5 0 1 0

28 683 7 6 1 0 0

29 705 5 5 0 0 0

30 729 9 8 1 0 0

31 758 5 3 2 0 0

32 779 5 4 1 0 0

33 801 4 4 0 0 034 822 9 7 1 0 1

35 856 5 5 0 0 0

36 876 4 2 2 0 0

37 895 3 3 0 0 0

38 921 3 2 0 1 0

39 945 7 6 1 0 0

40 975 4 3 1 0 0

41 995 2 0 1 1 0

42 1019 3 3 0 0 043 1040 2 2 0 0 0

45 1092 4 3 1 0 0

46 1112 3 2 1 0 0

47 1142 4 3 0 0 1

48 1168 1 1 0 0 0

49 1200 1 1 0 0 0

50 1217 1 1 0 0 0

51 1236 1 1 0 0 0

52 1262 3 2 1 0 0

53 1280 2 2 0 0 0

54 1299 3 3 0 0 0

55 1329 1 1 0 0 0


7/43

85 2061 1 1 0 0 0

87 2110 1 1 0 0 0

89 2154 2 2 0 0 090 2180 3 3 0 0 0

91 2191 1 1 0 0 0

93 2239 1 1 0 0 0

94 2265 1 1 0 0 0

102 2466 1 0 0 1 0

104 2503 1 1 0 0 0

106 2549 1 1 0 0 0

107 2585 1 1 0 0 0

109 2626 1 1 0 0 0115 2771 1 1 0 0 0

122 2934 1 1 0 0 0

123 2958 1 1 0 0 0

126 3032 1 1 0 0 0

127 3060 1 1 0 0 0

137 3291 1 1 0 0 0

144 3475 1 1 0 0 0

154 3709 1 1 0 0 0

169 4066 1 1 0 0 0172 4135 1 1 0 0 0

179 4306 1 1 0 0 0

191 4601 1 1 0 0 0

192 4617 1 1 0 0 0

201 4842 1 1 0 0 0

268 6454 1 0 0 1 0

287 6890 1 0 0 1 0

328 7889 1 1 0 0 0371 8922 1 1 0 0 0


8/43

0

50

100

150

200

250

300

350

HP Turbine IP Turbine LP Turbine Valves Piping Lube Oil Controls Misc. Turbine

NumberofEv

ents

Major Cause Group

Forced Outages 1982-1998


9/43

0

50

100

150

200

250

300

350

400

3 10 17 24 31 38 45 52 59 66 73 80 87 94 101 108 115

NumberofEv

ents

Duration (Days)

Forced Outage Duration 1982-1998 (up to 4 months)


10/43

0

100

200

300

400

500

600

700

800

900

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

NumberofOu

tages

Duration (weeks)

Forced Outage Duration by Week (up to 4 months)


11/43


12/43

0

50

100

150

200

250

300

350

400

3 7 11 15 19 23 27 31 35 39 43 47 51 55 59

NumberofEven

ts

Duration (Days)

Forced Outage Duration for Events from 3 to 60 Days


13/43

0

20

40

60

80

100

120

140

160

1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998

NumberofForcedOutages

Year

Failure Rate


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Forced Outage Statistics Summary

Group Breakdown Summary

LSB Length Capacity 1982-1998 1996-1998

35 200-1000 368 55

25-35 200-399 400 62

25-35 400-599 481 63

25-35 600-799 243 31

25-35 800-999 48 5

all >1000 40 4

Average and Maximum Forced Outage Times

Cause Events Avg Duration Max Duration Events Avg Duration Max Duration

hours hours hours hours

HP Turbine 209 393 6890 34 280 994

IP Turbine 77 588 6454 13 432 1561

LP Turbine 298 461 7889 39 356 2239

Valves 299 161 2934 44 200 2191

Piping 90 265 8922 11 113 221

Lube Oil 115 278 4601 18 300 1734

Controls 192 215 4135 27 197 1582Misc. 317 348 4306 38 406 2184

Number of EventsGroup

1982-1998 1996-1998


15/43


Capacity: 200-1000 MW

LSB Length:


16/43

30 721 1 1 0 0 0

60 1446 1 1 0 0 0

63 1535 1 1 0 0 0

122 2934 1 1 0 0 0191 4601 1 1 0 0 0


17/43

0

2

4

6

8

10

12

14


NumberofEvents

Major Cause Group

Forced Outages 1982-1998, Capacity 200-1000 MW, LSB Length


18/43

0

5

10

15

20

25

30

35

40

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

NumberofEvents

Duration (weeks)

Forced Outages 1982-1998, Capacity 200-1000 MW, LSB


19/43



LSB Length: >35 inches


The interval between forced outages of the same cause code has been limited to 30 days.


Cause Group Group Definition Events U1 U2 U3 SF

4000-4099 HP Turbine 63 45 10 5 34100-4199 IP Turbine 16 13 3 0 0

4200-4250 LP Turbine 56 47 3 4 2

4260-4269 Valves 85 60 15 6 4

4270-4279 Piping 25 22 1 2 0

4280-4289 Lube Oil 22 15 4 1 2

4290-4309 Controls 36 31 3 1 14400-4499 Misc. Turbine 65 55 3 3 4

368



days hours

0 4.5 109 188 144 23 12 9

1 9.8 235 111 88 11 6 6

2 16.1 387 21 16 1 3 1

3 23.5 565 15 13 2 0 04 31.3 751 12 10 2 0 0

5 37.5 900 5 5 0 0 0

6 44.7 1072 4 4 0 0 0


20/43

9 230 23 18 1 2 2

10 252 10 8 1 0 1

11 272 13 10 2 1 0

12 301 9 9 0 0 0

13 321 10 9 1 0 0

14 347 6 2 1 2 1

15 373 6 5 0 1 0

16 396 4 4 0 0 0

17 430 3 3 0 0 0

18 446 1 1 0 0 0

20 488 1 1 0 0 0

21 516 5 4 1 0 022 533 2 2 0 0 0

23 569 2 2 0 0 0

24 588 2 1 1 0 0

25 611 2 2 0 0 0

26 626 1 1 0 0 0

27 664 1 1 0 0 0

28 681 4 4 0 0 0

30 735 1 1 0 0 0

31 746 1 0 1 0 032 776 2 1 1 0 0

33 802 1 1 0 0 0

34 819 3 3 0 0 0

35 858 1 1 0 0 0

36 866 1 1 0 0 0

37 890 1 1 0 0 0

39 945 2 2 0 0 0

42 1025 1 1 0 0 0

43 1032 1 1 0 0 0

45 1099 1 1 0 0 0

47 1132 1 1 0 0 0

52 1265 2 1 1 0 0


21/43

0

10

20

30

40

50

60

70

80

90


NumberofEvents

Major Cause Group

Forced Outages 1982-1998, Capacity 200-1000 MW, LSB Length


22/43

0

20

40

60

80

100

120

140

160

180

200

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

NumberofEvents

Duration (weeks)

Forced Outages 1982-1998, Capacity 200-1000 MW, LSB >35 inches


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LSB Length: 25-35 inches






4200-4250 LP Turbine 72 55 9 4 4

4260-4269 Valves 79 50 15 10 4

4270-4279 Piping 19 8 8 2 1

4280-4289 Lube Oil 29 23 4 0 2


400



days hours

0 4.6 110 219 155 25 26 13

1 9.7 234 95 64 20 5 6

2 16.7 402 22 15 5 1 1

3 24.2 580 17 12 1 2 24 31.9 767 10 7 3 0 0

5 39.2 941 7 5 1 1 0

6 44.7 1073 4 2 1 0 1


24/43


Duration Avg Duration Events U1 U2 U3 SF

days hours

3 83 87 62 11 9 5

4 107 50 38 4 4 4

5 131 49 33 7 6 3

6 158 33 22 3 7 1

7 178 24 17 5 1 1

8 204 18 11 3 3 1

9 226 15 9 4 1 1

10 250 11 6 2 0 3

11 275 9 6 3 0 012 300 8 7 1 0 0

13 325 10 8 2 0 0

14 351 6 5 1 0 0

15 382 2 2 0 0 0

16 398 7 6 1 0 0

17 413 2 1 1 0 0

18 446 2 0 0 1 1

19 470 1 0 1 0 0

20 496 2 1 1 0 021 514 3 0 0 1 2

22 536 2 1 1 0 0

23 560 3 3 0 0 0

24 580 2 2 0 0 0

25 613 4 4 0 0 0

27 654 3 2 0 1 0

28 675 1 0 1 0 0

29 698 1 1 0 0 0

30 721 1 1 0 0 0

31 758 2 1 1 0 0

33 800 3 3 0 0 0

34 828 2 1 1 0 0


25/43

90 2184 1 1 0 0 0

102 2466 1 0 0 1 0

107 2585 1 1 0 0 0

109 2626 1 1 0 0 0

115 2771 1 1 0 0 0

123 2958 1 1 0 0 0

127 3060 1 1 0 0 0

144 3475 1 1 0 0 0

169 4066 1 1 0 0 0

179 4306 1 1 0 0 0

192 4617 1 1 0 0 0

328 7889 1 1 0 0 0371 8922 1 1 0 0 0


26/43

0

10

20

30

40

50

60

70

80

90

100


NumberofEvents

Major Cause Group

Forced Outages 1982-1998, Capacity 200-399 MW, LSB Length 25-35 inches


27/43


28/43









4200-4250 LP Turbine 97 79 7 8 3

4260-4269 Valves 82 55 11 12 4

4270-4279 Piping 27 20 2 3 2

4280-4289 Lube Oil 36 29 4 0 3


481



days hours

0 4.4 105 273 198 35 26 14

1 9.6 229 100 82 9 7 2

2 16.4 393 34 28 4 2 0

3 24.1 578 23 22 1 0 04 31.2 750 14 13 0 0 1

5 39.1 938 7 5 1 1 0

6 46.2 1108 7 7 0 0 0


29/43

8 202 21 18 2 0 1

9 229 21 18 1 2 0

10 254 11 8 2 1 0

11 277 14 12 1 1 0

12 299 6 6 0 0 0

13 322 4 4 0 0 0

14 347 11 9 1 1 0

15 371 8 6 1 1 0

16 395 2 1 1 0 0

17 415 5 4 1 0 0

18 446 3 3 0 0 0

19 470 3 3 0 0 020 488 2 2 0 0 0

21 515 2 2 0 0 0

22 543 4 4 0 0 0

23 567 6 5 1 0 0

24 591 6 6 0 0 0

25 609 2 2 0 0 0

26 631 2 2 0 0 0

27 666 1 1 0 0 0

28 691 1 1 0 0 029 706 4 4 0 0 0

30 730 3 3 0 0 0

31 767 1 1 0 0 0

32 778 2 2 0 0 0

34 822 3 2 0 0 1

35 857 2 2 0 0 0

38 930 1 1 0 0 0

39 954 1 1 0 0 0

40 978 1 1 0 0 0

41 995 2 0 1 1 0

43 1049 1 1 0 0 0

45 1088 2 2 0 0 0


30/43

94 2265 1 1 0 0 0

126 3032 1 1 0 0 0137 3291 1 1 0 0 0


31/43

0

20

40

60

80

100

120


NumberofEve

nts

Major Cause Group



32/43

0

50

100

150

200

250

300

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

NumberofEve

nts

Duration (weeks)

Forced Outages 1982-1998, Capacity 400-599 MW, LSB 25-35 inches


33/43









4200-4250 LP Turbine 60 56 3 1 0

4260-4269 Valves 37 20 7 8 2

4270-4279 Piping 12 10 1 1 0

4280-4289 Lube Oil 14 11 0 3 0


243



days hours

0 4.6 111 137 96 19 18 4

1 9.9 238 55 47 2 5 1

2 16.7 401 17 15 0 0 2

3 24.4 587 9 9 0 0 0

4 31.3 750 7 6 1 0 0

5 37.3 895 7 6 1 0 0

6 46.7 1122 2 1 1 0 0


34/43

10 252 9 8 0 1 0

11 274 4 4 0 0 0

12 298 6 6 0 0 0

13 323 5 4 0 1 0

14 348 6 6 0 0 0

15 373 2 2 0 0 0

16 404 1 0 0 0 1

17 416 3 3 0 0 0

18 452 2 1 0 0 1

19 465 2 2 0 0 0

20 503 1 1 0 0 0

21 505 1 1 0 0 022 542 1 1 0 0 0

23 572 2 2 0 0 0

24 583 2 2 0 0 0

26 637 2 2 0 0 0

27 648 1 1 0 0 0

28 687 1 1 0 0 0

30 732 3 2 1 0 0

31 763 1 1 0 0 0

32 789 1 1 0 0 034 816 1 1 0 0 0

35 853 2 2 0 0 0

36 869 1 0 1 0 0

37 898 2 2 0 0 0

38 916 1 1 0 0 0

40 975 1 1 0 0 0

45 1094 1 0 1 0 0

47 1150 1 1 0 0 0

54 1301 1 1 0 0 060 1463 1 1 0 0 0

65 1561 1 1 0 0 0

66 1597 2 2 0 0 0


35/43


36/43

0

20

40

60

80

100

120

140

160

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

NumberofEve

nts

Duration (weeks)



37/43









4200-4250 LP Turbine 6 5 1 0 0

4260-4269 Valves 7 3 2 2 0

4270-4279 Piping 6 3 2 1 0

4280-4289 Lube Oil 4 3 1 0 0


48



days hours

0 4.2 101 31 17 8 6 0

1 9.1 217 13 9 3 1 0

2 14.6 351 1 0 1 0 0

3 23.2 557 1 0 1 0 05 37.9 910 2 0 2 0 0


38/43

0

2

4

6

8

10

12

14


NumberofEve

nts

Major Cause Group



39/43

0

5

10

15

20

25

30

35

0 1 2 3 4 5

NumberofEve

nts

Duration (weeks)



40/43


Capacity: >=1000 MW

LSB Length: >=30 inches






4200-4250 LP Turbine 7 5 1 1 0

4260-4269 Valves 3 1 1 0 1

4270-4279 Piping 4 4 0 0 0

4280-4289 Lube Oil 1 0 1 0 0


40



days hours

0 4.7 112 13 10 1 2 0

1 9.5 228 20 16 3 0 1

2 16.7 401 3 2 0 0 1

4 29.9 718 2 1 0 0 1

6 45.4 1090 1 0 1 0 011 77.5 1860 1 0 1 0 0


41/43

45 1090 1 0 1 0 077 1860 1 0 1 0 0


42/43


43/43

0

5

10

15

20

25

0 1 2 3 4 5 6 7 8 9 10 11

NumberofEve

nts

Duration (weeks)

Forced Outages 1982-1998, Capacity >1000 MW

forced outages

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